property Column.EditMaxLength as Long
Gets or sets the number of characters a user can type into the control's edit.

TypeDescription
Long A long expression that defines the maximum characters the user can type into the column's editor.
By default, the EditMaxLength property is 0, which indicates no effect.  The EditMaxLength property limits the number of characters the user can type into the column's text-box. The control display no edit-controls if the Style property is  DropDownList. The AutoComplete property  disables disable auto complete feature. The AutoSearch property disables the control's incremental search feature. For instance, EditMaxLength property on 2 limits the user to type up to 2 characters within the giving column.